Closure device



c. w. sHAw CLOSURE DEVICE Jan. 31', 1939.

2 SheetsSheet 1 Filed March 2, 1936 CLARENCE W SHAW ATTORNEYS.

Jan. 31, 1939. .c. w. SHAW I CLOSURE .bEV ICE Filed Malrch 2, 19 6 2 She ets-Sheet 2 INVENTOR. BY .aA/PE/YCE M SHAW ATTORNEYS.

' Patented Jan. 31, .1939

UNITED STATES PATENT OFFICE cnosunn navr'ca ClarenceW. Shaw, Detroit, Mich, assignor, by

mesne assignments, to Eaton Mann! acturing Company, OlevelamL'Ohio, a corporation of Ohio Appu'mien M 2., ms, sci-m No. cam 14 claim. (01. ace-4o) This invention relates to closures for fluid con:

taining receptacles, and more particularly to oldsures of the type adapted forreleasable sealing connection with a filler neck or opening of the a receptacle. I

An object of this invention is to provide an improved closure device of such simplified form that its relatively few parts can be very economically manufactured andassembled.

10 Another object of the invention is to provide an of disk-like form and has a substantially central fulcrum projection about which the relative rocking of the outer and inner cover members takes place. Yet, another object of this invention is to provide an improved closure device embodying an air chamber and having novel means for efliciently venting a fluid container through such air chamber substantially 'without loss of liquid through 30 the vent mean Y Still another object of this .invention is toprovide an improved closure device, of the type re .ferred to, wherein the inner cover structure comprises a pair "of cooperating members providing 35 an air chamber therebetween and shiftably re} tained in the outer cover member by the cam engaging projections thereof, and wherein novel means is provided for venting afluid containing receptacle through said air chamber.

Other objects and advantages of the invention will be apparent from the-following description, when taken in conjunction with the accompanying sheets of drawings, 'wherein- Fig. 1 is a vertical sectional view taken through a closure device embodying my invention and showing such device applied to a flllerneck.

Fig; 2 is a bottomplan view showing the closure of Fig. 1 in detached relation.

Fig. 3 is a plan-view of the resilient disk-like member which'forms a part of my improved closure device. a Fig. 4 is .a vertical sectional viewof another closure embodying my invention and showing the same applied to a filler neck.

14 of m.

Fig. 5 is a similar vertical sectional V ew Show-.-

ing still another closure embodying my invention.

Fig. 6 is a detached plan view of a cup-like I member forming a part of the inner cover structure of Fig. 5.

Fig. 7 is a partial sectional view taken on line 6 and showing one of the hooded vents. v

Fig. 8 is a plan view showing a filler neck to which my improved closure may be applied.

Fig. 9 is a side elevation thereof. 1 Fig. 10 is a vertical sectional view showing my invention embodied in another novel closure device which is applicable to vehicle radiators or the like. a

Fig. 11 is a transverse sectional view thereof taken on line ll-ll of Fig. 10. I d Fig. 12 is a vertical sectional, view showing my invention embodied in still another closure device. Fig; 13 is a bottom plan view of the closure in detached relation with the inner cover member removed therefrom, and i Fig. 14 is a sectional view taken on the line I,4l4 of Fig. 13.-

- More detailed reference will now be made to the accompanying drawings which illustrate preferred forms of my improved closure device, but before proceeding. with such detailed description -I desire it to be understood that my invention may be embodied in various other closure devices and venting arrangements than the particular ones herein disclosed.

My invention is especially applicable to closure devices of the 'quick detachable bayonet-type, such as are more or less commonly used on radiator and fuel tank openings of motor vehicles. Fluid containers of this type are usually provided with a tubular flller neck, and I have shown my improved closure device as applied to such a neck. Figs. 8 and 9 of the drawings show a suitable filler neck of this type to which my closure device may be applied. This filler neck comprises a tubular member III, which may be a part of or connected with the fluid container, and which has 'an external annular flange II at its outer end.

This external flange forms an annular gasket seat and carries a plurality of circumferentially spaced be engaged by suitable means ofthe closure device for releasably connecting the same with the neck. These locking cams may be formed on downwardly and outwardlyextending portions of the external flange l l to extend between the openings I 3 thereof which accommodate the projections of the closure device when the latter is applied to the neck. Each of the cams may be proarcuately extending locking cams l2 adapted to I seat of the neck during such locking cooperation.

The outer cover structure l8 may be in the 'form of a generally circular closure body having a transverse top wall 2I'of spheroidal or other desired shape, and a depending annular marginal skirt 22. For releasably connecting the closure device with the filler neck I provide the skirt 22 of the outer cover member with inwardly extending lugs 23 which cooperate with the locking cams I2 in a manner now well understood in this art. The lugs 23 are of a size and shape to pass through the openings I3 of-the filler neck and are spaced circumferentially of the depending skirt 22 a distance corresponding substantially with the spacing of such neck openings.

The inner cover structure l9 may comprisea pair of-oppositely dished upper'and lower members 25 and 26 in cooperating relation to provide an air chamber 21 therebetween. The member 25 may be a generally circular or disk-like resilient metal member. In accordance with my invention, either the transverse wall 2| of the outer 30 is preferably deflected or inclined with respect to the flat portion 29 so that this flange extends I upwardly as well as outwardly, as is clearly illlS- trated in Fig. 1 of the drawings.

The member 2B has a downwardly dished or cup-like portion which extends into the opening of the-filler neck when the closure device is applied thereto and an annular marginal flange 33 which presses the gasket 20 against the gasket seat of' the filler neck. The cup like portion of. this member may be constructed with a spheroidal bottom wall 34 and with a substantially cylindrical side wall portion 35 which connects the spheroidal bottom wall portion with the annular flange33. The cylindrical wall portion 35 may be of a diameter, in relation to the internal diameter of the filler neck, to enable the cup-like portion of the member 26 to function as a pilot means when the closure device is applied to the neck. The marginal flange 33 of this member preferably extends upwardly and outwardly. in substantially the'same angular relation as the flange 30 so as to have a'complemental and more or less sealing engagement. therewith.

The inner closure structure formed by the members 25' and 26. is relatively freely movable in all directions in the outer cover member and of the outer cover member to readily cooperate with the locking cams of the filler neck as the closure device is applied thereto and, at the same time, enables the inner cover structure to position itself relative to the outer end of the filler neck and to press the gasket 20 into eiiicient sealing engagement with the seat thereof. The relative movement which takes place between the inner and outer cover structures during the application of the closurev device to the filler neck is, in part, a relative rocking aboutthe fulcrum projection 28. Such relative rocking between the inner and outer cover structures may be limited, to an extent desired, by the engagement of the upwardly and outwardly extending marginal flange 30 with the transverse top wall of the outer cover member. In addition to the function of limiting the relative rocking between the inner and outer cover structures, the inclination'of the flanges 30 and 33, provided by having them extend upwardly and outwardly as explained above, is desirable because it causes the gasket 20 to be pressed against an annular portion of the filler neck which lies inwardly of the openings l3.

In .what I now regard to be a practical form of construction for my improved closure device, I provide the annular skirt 22 with'three of the inwardly extending lugs 23 and also provide the filler neck with three equally spaced locking cams l2. When the outer cover member I8 is provided with three such lugs I find that the members 25 and 26 of the inner cover structure and the gasket 20 can be very easily assembled into the outer cover member without the need of tools of any kind whatever. This is accomplished by inserting the members and the gasket 20-beneath two of the lugs and then deflecting. the members and gasket slightly so as to pass the third lug. To facilitate this assembly operation one or both of the members 25 and 26, but preferably only the member25, may be provided with a flat or chord-like portion 36 at some one point of its circumference, as shown in Fig. 3 of the drawings.

When my improved closure device of Fig. 1 is to be used on certain fluid containers, such as the fuel tanks of motor vehicles, it may be desirable to provide for venting of the tank through the closure device. I find that such venting can be very expeditiously and efficiently. accomplished through the air chamber 27 by providing relamarginal flanges 30 and 33 and the gasket 20.- The vent passages 39 connect the air chamber?! with the interior of the tank,

-In connection with the inner cover structure formed by the members 25 and 26, it will be noted that the air chamber 21 is of relatively large capacity or volume, and this is an important and there is often a tendency for fuel to be forced out of the tank through the vent. openings of the a unless'the cup portion 34 has been substantially v a substantial time element is involved in the passage of fuel through these openings, such that the surging of the fuel will have ceased before the chamber 21 becomes full and the fuel which has already passed into this chamber will be sucked or withdrawn therefrom back into the fuel tank. u

As explained above the venting of the chamber 4 21 takes place around the outer edge of the gasket 20 and, when this venting arrangement is employed, it'may be desirable to provide the outer,

edge of the gasket with notches or serrations 40 which provide air passages between the outer edge of the gasket and the depending skirt 22. These notches insure the presence of an air passage between the edge of the gasket and the skirt in the event that the gasket expands sufliciently to press the outer edge thereof against the skirt.

It will be understood, of course, that in the cooperation of my improved closure structure with the flller neck, the locking and unlocking is accomplished by relative rotary movement therebetween, and from the arrangement as illustrated in Fig. 1 and just described, it will be readily seen that the rotatlve force required to produce such locking or unlocking is very low, because the inner closure structure and gasket do not rotate relative to the neck but are merely pressed in sealing engagement therewith by the outer cover member. In applying a closure device to a filler neck having external cams it sometimes occurs that one of the cam engaging pro- :Iections of the closure will ride on top of the flange of the neck instead of engaging under the cam l2, and this condition prevents-proper sealing engagement of the closure with the neck. In my. improved closure device such-improper assembly is prevented by limiting relative.rockbetween the outer'and inner cover members 5' and by certain proportioning of the cooperating a fby thetopof the outer cover member during rela- The relative'rocking between the inner andouter cover members may be limited, as explained above, byhaving the annular marginal flange 30 extend upwardlyand outwardly to be engaged tive'ro'cking. As to the proportioningofthe parts, I'flnd'that very good results are obtained when I construct my closure device so that the clearance space 4| bears a more or less definite rela- "tion to the vertical distance 42 between the top of the neck flange and the starting portion of the cam l 2. If the height of the clearance space 4|. is approximately one-half "of the distance 42, as measured with the closure on the neck but prior to locking rotation thereof, I'flnd that the relative rocking between the outer and inner cover members is limited to'an extent which prevents one of the locking projections from riding on top of the neck flange.

When my improved closure device is to be applied to a receptacle which does not require venting or which has independent venting means,

the vent passages 38 and 39 may be omitted, or,-

if desired, the vent opening 38 and the member 25 of the inner cover structure may be omitted.

' In Fig. 4 of the drawings I have shown my invention embodied in such a simplified form of closure device from which the venting feature the outer end of the filler neck by an inner cover member The inner cover member 5| may be a resilient disk-like metal part generally similar to the member 25 of Fig, 1 and having a localized'central fulcruming projection 52 for engagement with the transverse top wall 46 of theouter cover member and an upwardly and outwardly extending annular marginal flange 53 for limiting relative rocking between the inner and outer cover members and for pressing the annular gasket 50 against the flller neck. The inner cover member 5| has relatively free movement in all directions in the outer cover member 45 and is retained therein only by the inwardly extending lugs 41 of the latter member.

In Figs. 5 and 6 of the drawings I have shown my invention embodied in a closure device which .is generally similar to that of Fig. 1 but which provides a somewhat different venting arrangement. This closure device comprises outer and inner cover members 55 and 56 and is adapted to thereof with a localized fulcruming projection 64 which engages the top wall of the outer cover member 55 and about which relative rocking between the inner and outer cover members takes place.

My improved venting arrangement, as embodied in this closure device, includes vent passages '68 and 81 which provide for venting of the fluid'container with which the clcsure device is used through the air chamber 60. The vent pas.-

sage 66 is a relatively restricted passage adjacent the top of the chamber 50, preferably being formed through the fulcruming projection 64. The vent passages 81 are relatively large passages .formed through the substantially fiat bottom wall of the cup portion of the member 59. These relatively large vent passages 61 are preferably I each provided with a deflecting hood 68 which may be formed integral with the bottom wall of the cup portion by shearing and deflecting metal thereof at certain points. These vent hoods are preferably contained in the air chamber and are preferably disposed in a circumferentially extending series, as shown in Fig. 6. The hoods are individually disposed so that each hood will cause fluid which passes through its opening 61 to be directed toward the side wall of the cham ber 60 substantially tangentially thereof. -As indicated in Fig. 6, the hoods may be arranged in the series so that the tangential discharge of fluid through the openings 6'l wi1l tend to cause rotation of the fluid in the air chamber.

By reason of the arrangement of the hoods as just described, it will be seen that fluid can readily pass into'the air chamber 89 through thevent openings 61 when surging occurs in the fuel tank, but-thattheflowbf fluid into the air chamber is tdirected laterally instead of toward the restrictedvent .opening 56 and the velocity of the Led-isch g'e is dissipated in producing ,a rotary lthe fluid in the air chamber. 'When ly large vent openings 61 permitfluid to readily drain back into the tank from the chamber 69. I have found that this venting arrangement H substantially eliminates loss of fluid from'a tank 1 relatively short, large diameter necks, such as are often provided on the fuel tanks of tractors.

Such fuel tanks are often located close to the engine" and are frequently exposed to the suns rays.

These conditions tend to cause vapor to f be generated in substantial volume in the tank 25, the vent openings, espec1ally when the fuel surges and forced out through the vent openings. Such outflow of vapor tends to carry fuel out through or is splashed about in the tank as would occur 'duringthe operation of a tractor. In my novel venting'arrangement'such loss of fuel does not occur because fuel is not trapped in the airchamber but drains freely-therefrom, and because the flow 'of fuel into the air chamber is deflected away from the top vent passage.

In Figs. 10 and 11 I show my invention em bodied in another closure device which is especially suitable for use on vehicle radiators and the like. In the particular form of this closure device herein illustrated, I show a tank or radiator 'I9 having a tubular filler n'cck II to which the cap is applied. The filler neck has external locking cams 12 and is provided with an annular gasket seat 'I3,at its'outer end. Adjacent its in-'- ner end the neck is provided with a laterally extending flexible metal washer Mjwith which a" part of the cap cooperates to provide a seal axially inwardly of the seal provided" by the engagement of the gasket I5 of the cap with the annular gasket seat. At a point between 'the'seal provided by the gasket'15 and the seal provided by the flexible washer III, the neck has a vent and overwhich-one end of a drain flow opening 16 to "'tube'l'l may bejconnected.

,"The closure itself comprises an outer cover v member 19 and an inner cover member which is "composed of 'complementalparts' 80 and 8|. These complemental parts of the inner cover memberare shaped to provide anair chamber 82 "therebetween, and are provided with upwardly and outwardly. extending annular marginal 6. flanges 83 and 84 which sealingly engage each seat of the'neck. The member 80 may be a resilother and press the gasket I5 against the gasket ientdisk-like metal member which has rocking or fulcruming engagement with a. depending central projection .85 of the outer cover member. The member 8Imay be a hollow depending part having more or less the shape of a truncated cone.

The inner cover structure formed by the members 80 and 8| is relatively freely movable in the outer cover member 19 but is'retained therein by the inwardly extending lugs'88 which cooperate with the external locking cams, of the neck.

As shown in Fig. 10, the depending member 8| of the inner cover structure extends into the opening 1oiqthe nck with its wall spaced from the ging of fluidin the tank ceases, the relaelement.

wall of the neck to provide an annular vent chamber 81 therebetween. The vent passage 16 of the neck communicates with this'chamber, and the chamber 82 of the inner cover structure may also communicate with this chamber through vent openings 88. The latter vent openings are formed through the member 8| preferably at a relatively high point thereof. The lower end of the depending member BI is formed with an annularly extending shoulder 89 which engages and deflects the flexible washer I4 when the closure is applied to the neck. The parts are so constructed and arranged that this shoulder engages the washer 14 to provide an inner seal at the same time that the gasket is pressed against the seat 13' of the neck to provide the outer seal.

The lower end of the depending part 8| may be provided with a tubular extension 99 which extends into or through the opening of the washer I4. This extension is provided with an opening at the bottom thereof which communicates with the interior of the tank or radiator but which is normally substantially closed by a check valve The check valve element employed in this instance is a ball 9! adapted to be normally held in its closed position by gravity. A restricted vent passage may be provided past the check valveball 9|, preferably in the form of a V-notch 92 cut into the edge of the valve seat.

From the closure construction just described it will be seen that the radiator or tankv I9 is normally vented to atmosphere through the V-notch 92, air chamber 82, vent passages 88, annular chamber 81, passage I6, and drain tube TI. During ordinary operating conditions, the venting takes place as just traced without opening of the check valve 9|. However, if pressure should develop in 'the radiator, such as might result from the generation of steam or expansion of the coolant, the check valve 9| will be opened and the pressure will be relieved to atmosphere through theopenings 88, the chamber 81, and the drain tube 11. w

In Figs. 12, 13 and 14; I have shown my invention embodied in another closure device of the type having external 10c g means but wherein the outer cover structure is of somewhat different construction. In this latter form of closure device, -I show a filler neck 95 having external locking cams, 96 and an annular seat 91 against which the gasket 98 of the closure may. be pressed.

The closure itself includes a resilient disk-like inner cover member 99 having an upwardly and outwardly extending annular marginal flange I08 for pressing the gasket against the seat of the neck. The closure also includes an outer cover member comprising a body member I Ill and a shell I02 of more or less ornamental character which is mounted on such body member. According to my invention, the body member llll is of relatively large diameter and has a plurality of spaced arcuately extending arms I93 depending around the inner cover member 99 and provided with inwardly projecting lugs I04 for cooperation with the locking cams of the-neck.

Thesedepending arms I83 are formed from sections partially sheared from the top wall of the body member. To illustrate how thesearms are formed by partially shearing and downwardly deflecting'the sections of metal, I have shown by the 1 mg to provide the smooth oval-shaped openings I 08 shown in Fig. 13. The top'wall of'the body member II from which the arms I 03 have been thus sheared and deflected, may be reenfor'ced if desired by Pro iding the same with one or more radially extending ribs "IT. The top wall of this member may also be provided centrally thereof with a localized depending fulcruming fprojection I08 which engages the inner cover member 99. v

As shown in Fig. 12, the body member llll may have a depending annular flange or skirt llll spaced outwardly from the depending arms I03 and around which a skirt portion H2 of the shell I02 may be crimped.

Fromthe foregoing description and the accompanying drawings it. will now be readily understood'that I have provided' an improved closure device of such simplified construction that the relatively few parts thereof can be very economically manufactured and assembled. It will be further understood that in my improved closure device provision is made for relatively free movement between inner and outer cover members, and that this relative movement enables lugs of the outer cover member to cooperate with external locking cams of a filler neck while the inner cover member sealingly cooperates in an efficient manner with the gasket seat of the neck. It will also be readily understood that I have provided a novel .venting arrangement adapted to be embodied in a closure device of simplified construction and which provides for efllcient venting of a receptacle substantially without loss of fluid therefrom,

. even though the contents of the receptacle may be subjected to violent surging.

While I have illustrated and described the improved closure and venting means of my inven-' I appended claims.

Havingthus'described my invention, I claim:

1; In a closure, ,for a receptacle neck having external cam locking portions thereon, a closure bodyhaving inwardly extending cam engaging portions for locking cooperation with.the cam portions of the neck, and an inner cover member 'normally retainedin saidfclosure body by 'said in-- wardly extending portions andadapted to sealingly engage said neck during said locking coopera:

tion, saidvinner cover member being resilient and having a localized fulcrum projection substantiallycentrally thereof for engagement with the closure body and a marginal portion adapted to cooperate with the closure body for limiting relative rocking of the closure body and the inner cover member about said fulcrum projection.

2. In a closure'for a receptacle neck having external .cam portions thereon, an outer cover member having a depending annular skirt provided with spaced inwardly extending portions for locking cooperation with said cam portions, and a flexible metal innercover shiftably retained in the outer cover-member and adapted for sealing engagement with said neck, said inner cover being upwardly dished and having a substantially flat central portion provided with an elevated localizerl projection centrally thereof and also having an upwardly and outwardly extending marginal flange. 1

3. In, a closure of the bayonet joint type, a neck having external lockingcams, a closure body having a depending annular skirt provided with inwardly projecting cam engaging portions, an upwardly dished resilient innencover relatively freely movable in said body and having an upwardly and outwardly extending annular marginal flange providing a relatively inclined gasket seat, said inner cover also having an integralflocalized central projection directly en'- gageable with the closure body to provide for relative rocking t'herebetween and being retained in said body only by cooperation of the cam engaging portions thereof with said flange, and a gasket adapted to be sealingly pressed against the neckby said flange.

wardly extending lugs for locking cooperation with the locking means of said neck, and an inner cover shiftable in said closure body and adapted for sealing engagement with said neck during 'saidlocking cooperation, said inner cover comprising upper and lower oppositely dished members defining an air chamber therebetween and one of which projects beyond the inner portions of said lugs for retaining the inner cover in said closure body, said upper member being resilient and adapted to flex during said locking cooperation.

5. In-a closure for a receptacle neck having externallocking means, a closure body having inwardly extending means for locking cooperation with the locking means of said neck, an inner cover shiftable in said closure body and adapted for sealing engagement with said neck during said locking cooperation, said inner cover comprising cooperating members defining an air chamber therebetween and having portions extending beyond the inner portions of the locking meansof the closure body for retaining the inner cover therein, one of the members having a depending cup portion and the other being resilient and having an elevated central projection engageable with 'said' body.

6. In a closure for a receptacle neck having external locking means, a closure body having inwardly extending means for locking cooperation with the locking means of said neck, a gasket, an inner cover shiftabie in said closure body and adapted to press the gasket against the neck for sealing engagement with said neck during said locking cooperation, said inner cover comprising members defining an air chamber therebetween and having annular marginal flanges engaging each other, said flanges providing a seat for said gasket and extending' beyond the inner portions of the locking means of the closure body for retaining'the inner cover therein, one of the members having a depending cup portion and the other being a resilient disk having an elevated central projection adapted for pivotal bearing engagement with the closure body durin'g said locking cooperation.

7. In a closure for a receptacle neck having external locking means, a closure body having inwardly extending means for locking cooperation with the locking means of said neck, an inner cover shiitable in said'closure body and adapted for sealing engagement with said neck during said locking cooperation, and projecting beyond the inner portions of the locking means of said closure body whereby the inner cover is retained in the closure body, said hm cover comprising members defining an air chamber therebetween 78 chamber therebetween, said inner cover projecting beyond the inner portions of the locking members of the closure body and being thereby retained in the latter, saiddished members having cooperating annular marginal flanges and having relatively free movement in'said closure body, one of said dished members being resilient and having localized pivotal bearing contact with the closure body during locking cooperation of the latter with the neck.

9. In a closure for a receptacle neck having, external locking means, a closure body having inwardly extending means for locking cooperation with the locking means of said neck, an inner cover shiftable in said closure body and adapted for sealing engagement with said neck durin said locking cooperation, said inner cover comprising members defining an air chamber therebetween and having annular marginal flanges engaging each other, one of the members having a depending cup portion and the other being res'ilient and having an elevated central projection engageable with the closure body, and vent means comprising a relatively restricted vent passage in said cup portion and a relatively restricted vent passage in said central projection, said inner cover projecting beyond the inner portions of the locking means of the closure body and being thereby retained in the later.

10. In a closure structure, a cap body having means providing an air chamber, a relatively restricted vent passage adjacent the top of said air chamber, and a vent passage at the bottom of said chamber having a hood portion arranged to deflect fluid laterally toward the side'of the chamber, said bottom vent passage being relatively large and adapted to permit relatively free drainage of liquid from said chamber.

-11. In a closure, structure, a cap body having means providing an air chamber, including an inner cap member having a depending cup portion provided with a substantially flat bottom, a-

relatively. restricted vent passage adjacent the top of said chamber, and a plurality of relatively large vent passages through said bottom and provided with hoods disposed to direct fluid laterally and substantially tangentially of the chamber.

12. In a closure device, a neck having an annular seat thereon and external locking cams depending from said seat, and a cap applied. to said neck and comprising outer and inner cover members, the outer cover member having projections adapted to cooperate with said cams and the inner cover member extending beyond the inner portions of-said projections whereby the inner cover member is retained in the outer cover member, said inner cover member having a central projection engaging the outer cover member and about which the cover members have relative rocking movement and having other portions normally spaced from the outer cover member but adapted to engage the same to limit said relative rocking, the spacing of said other portions from the outer cover member being approximately one-half the vertical distance between said seat and the starting portion of said cams when the cap is on the neck but prior to locking rotation thereof.

13. In combination, a neck having an annular gasket seat thereon and a vent passage inwardly of the gasket seat, a resilient washer extending transversely in the neck inwardly of said vent passage, and a closure adapted for releasable connection with the neck and having a gasket for engagement with said seat, said closure also having a portion adapted to extend into the neck for sealing engagement with saidwasher.

14. In, combination, a neck having axially spaced outer and inner annular sealing portions and a vent passage therebetween', and a closure adapted for'releasable connection with the neck with one part of the closure cooperating with said outer sealing portion, said closure having a hollow part adapted toextend into the neck passage adapted to be connected with the vent passage of the neck by the intervening space,

said inner annular sealing portion being resilient and adapted to be deflected by said hollow part whereby yieldable sealing engagement is provided.

therebetween.

. CLARENCE W. SHAW. 

